Re: git-pull from git.git - no remote ref for pu or next?

[Eric Wong <normalperson@yhbt.net>]

Linus Torvalds <torvalds@osdl.org> wrote:
> > And then it mysteriously fixed itself a few minutes later.
> > Is there some sort of publishing failure, or intermittent race condition?
> 
> But because the public sites just mirror using rsync, and aren't really 
> aware of git repositories etc at that stage, what can happen is that a 
> mirroring is on-going when Junio does a push, and then the changes to the 
> "refs/" directory might get rsync'ed before the "object/" directory does, 
> and you end up with the public sites having references to objects that 
> don't even _exist_ on those public sites any more.
> 
> And once the mirroring completes, the issue just goes away, which explains 
> why it just magically works five minutes later.

If kernel.org isn't using it already, I've found the --delay-updates
option of rsync works reasonably well and can cut down the
race-condition window.  It does use more memory and disk space, however.
atomic-rsync (a perl front-end distributed with the rsync source) takes
even more disk space but works across an entire subdirectory all at once
(with 2 renames)

--